MERCEDES-BENZ M-CLASS 2007 Owners Manual

220 Controls in detail3-zone automatic climate control*
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221 Controls in detail
3-zone automatic climate control*
1
Driver’s door air vent, fixed
2
Left side air vent, adjustable
3
Thumbwheel for air volume control
for left side and door air vent
4
Thumbwheel for air volume control
for left center air vent
5
Left center air vent, adjustable
6
Right center air vent, adjustable
7
Thumbwheel for air volume control
for right center air vent
8
Thumbwheel for air volume control
for right side and door air vent
9
Right side air vent, adjustable
a
Front passenger door air vent, fixed
b
Automatic climate control panel
i
For draft-free ventilation, move the sliders
for center air vents and side air vents to the
middle position.
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222 Controls in detail3-zone automatic climate control*
1
Temperature control, left
2
Air distribution and air volume
(automatic, manual)
3
Air distribution, driver’s side
4
Front defroster
0USA only
PCanada only
5
Increasing air volume
6
Rear window defroster
1USA only
FCanada only
7
Air distribution, passenger side
8
Rear automatic climate control
on/off
>USA only
™Canada only
9
Temperature control, right
a
Automatic climate control on/off
b
Air distribution, passenger side
c
Air distribution, passenger side
d
AC cooling on/off
Residual heat/ventilation
e
Display
f
Decreasing air volume
g
Air recirculation
h
Air distribution, driver’s side
j
Air distribution, driver’s side
k
Interior temperature sensor
l
Adopting driver’s side settings for all
zones
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223 Controls in detail
3-zone automatic climate control*
The automatic climate control is a 3-zone
intelligent automatic climate control sys-
tem. Your vehicle interior is divided into
3 zones.With the help of a sun sensor, the automat-
ic climate control determines the relation
of the sun to the vehicle and automatically
adjusts the inside temperature for every
individual zone.
The automatic climate control is operation-
al whenever the engine is running. It cools
the vehicle’s interior according to the an-
gle and intensity of the sun’s rays, the out-
side temperature and the selected
temperature. You can operate the auto-
matic climate control in either the auto-
matic or manual mode.
Nearly all dust particles, pollutants and
odors are filtered out before outside air en-
ters the passenger compartment through
the air distribution system.
The air conditioning will not engage (no
cooling) if the A/C mode is deactivated
(
page 222).
Warning!
G
When operating the automatic climate con-
trol, the air that enters the passenger com-
partment through the air vents can be very
hot or very cold (depending on the set tem-
perature). This may cause burns or frostbite
to unprotected skin in the immediate area of
the air vents.
Always keep sufficient distance between un-
protected parts of the body and the air
vents. If necessary, use the air distribution
controls (
page 222) to direct the air to air
vents in the vehicle interior that are not in
the immediate area of unprotected skin.
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224 Controls in detail3-zone automatic climate control*
Deactivating the automatic climate control system
Deactivating
Press button´ (
page 222) until
the displaye (
page 222) is cleared.
The indicator lamp on the button
comes on.Reactivating

Press buttonU(
page 222).
Warning!
G
Follow the recommended settings for heat-
ing and cooling given on the following pag-
es. Otherwise the windows could fog up,
impairing visibility and endangering you and
others.i
Severe conditions (e.g. strong air pollution)
may require replacement of the filter before its
scheduled interval. A clogged filter will reduce
the air volume to the interior.
If the vehicle interior is hot, ventilate the interior
before driving off, see “Summer opening fea-
ture” (page 239). The automatic climate con-
trol will then adjust the interior temperature to
the set value much faster.
Keep the air intake grille in front of the wind-
shield free of snow and debris.
Warning!
G
When the automatic climate control system
is switched off, the outside air supply and
circulation are also switched off. Only
choose this settings for a short time. Other-
wise the windows could fog up, impairing
visibility and endangering you and others.
i
You can also press button´
(
page 222) on the automatic climate control
panel.
If you press button0 (
page 222) to reacti-
vate the automatic climate control system, the
defrosting mode is activated.
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225 Controls in detail
3-zone automatic climate control*
Operating the automatic climate control system in automatic mode
You can switch the automatic climate con-
trol system on and off separately for each
zone as needed.
Activating
Press buttonU (
page 222) while
the engine is running.
The indicator lamp on the button
comes on.
AUTO
appears in the
displaye (
page 222). Air volume
and air distribution are controlled sep-
arately for each zone.

Use temperature controls1 and9
(page 222) to separately adjust the
air temperature on each side of the
passenger compartment.
The temperature of the interior is ad-
justed automatically.
Deactivating

Press one button of the air distribution
(page 222) or press button

orQ (
page 222).
The indicator lamp on buttonU
goes out and AUTO
disappears in the
displaye (
page 222).
Depending on which button you press –
the air distribution button or the air vol-
ume button
orQ – automatic
control of either the air distribution or
air volume is switched off.
Setting the temperature
Use temperature control1 and9
(page 222) to separately adjust the air
temperature on each side of the passenger
compartment. You should raise or lower
the temperature setting in small incre-
ments, preferably starting at 72°F (22°C).
The automatic climate control will adjust
to the set temperature as fast as possible.
Increasing

Turn temperature control1
and/or9 slightly clockwise.
The automatic climate control system
will correspondingly adjust the interior
air temperature.
Decreasing

Turn the temperature control1
and/or9 slightly counterclockwise.
The automatic climate control system
will correspondingly adjust the interior
air temperature.
i
When operating the automatic climate
control system in automatic mode, you will only
rarely need to adjust the temperature, air volume
and air distribution.
In automatic mode, cooling with dehumidify is
switched on. This function can be switched off if
necessary.
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226 Controls in detail3-zone automatic climate control*Adjusting air distribution
Use the air distribution controls3,h,
orj for the driver’s side, or7,b, orc
(page 222) for the passenger side to
separately adjust the air distribution on
each side of the passenger compartment.
The following symbols are found on the
buttons:

Press the desired air distribution but-
ton (
page 222).
The indicator lamp on the desired but-
ton goes out.
Adjusting the air distribution for the
center and side air vents
Opening the center air vents

Turn thumbwheels4 and7
(page 220) to the right.
The corresponding center air vents on
the left and right are open.
Closing the center air vents

Turn thumbwheels4 and7
(page 220) to the left.
The corresponding center air vents on
the left and right are closed.Opening the side air vents

Turn thumbwheels3 and8
(page 220) to the right.
The corresponding side air vents on the
left and right are open.
Closing the side air vents

Turn thumbwheels3 and8
(page 220) to the left.
The corresponding side air vents on the
left and right are closed.
Symbol
Function
Driver’s
side
Passen-
ger side
6
Z
Directs air to the
windshield and side
air vents
7
a
Directs air through
the center, side and
rear passenger
compartment air
vents
8
Y
Directs air to the
footwells and side
air vents
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227 Controls in detail
3-zone automatic climate control*
Adjusting air volume
Five blower speeds are available.
Press button
to decrease or
buttonQ to increase air volume
(page 222) to the desired level.
The indicator lamp on buttonU
goes out.
The AUTO
display disappears in the
displaye (
page 222) and the auto-
matic mode is switched off. The select-
ed blower speed appears in the
displaye (page 222).
Front defroster
You can use this setting to defrost the
windshield, such as when it is iced up. You
can also use it to defog the windshield and
side windows.
Activating
Press button0 (
page 222).
The indicator lamp on the button
comes on.The automatic climate control switches to
the following functions automatically:


maximum blower speed and heating
power


air flows onto the windshield and the
front side windows (side air vents must
be open)


the air conditioning compressor
switches on at outside temperatures
above approximately 41°F (5°C) for
air-drying
Deactivating

Press button0 (
page 222).
The indicator lamp on the button goes
out. Defrosting is turned off.
The previous settings are once again in
effect.
i
Keep this setting selected only until the
windshield or the side windows are clear again.
When the defrost setting has been selected, only
the rear window defroster can be switched on.
No other settings are possible.
i
To switch off, you can also press
button´ orU (
page 222).
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228 Controls in detail3-zone automatic climate control*Windshield fogged on the outside
Switch the windshield wipers on
(page 61).

Press buttonU (
page 222).
AUTO
appears in the displaye
(
page 222). Air volume and air distri-
bution are controlled separately for
each zone.
If the automatic air distribution and air vol-
ume are switched off:

Press buttons8 andY
(page 222).
Maximum cooling MAX COOL
If the air distribution control as well as the
airflow volume control are set toU and
there is a high need for cooling, the
MAX COOL function is activated.
“MAX COOL” appears in the front and rear
display.
This provides the fastest possible cooling
of the vehicle interior (when windows and
tilt/sliding sunroof* are closed).
Air recirculation mode
Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside (e.g. before driving
through a tunnel). This setting cuts off the
intake of outside air and recirculates the
air in the passenger compartment.
i
Keep this setting selected only until the
windshield is clear again.
Warning!
G
Fogged windows impair visibility,
endangering you and others. If the windows
begin to fog on the inside, switching off the
air recirculation mode immediately should
clear interior window fogging. If interior win-
dow fogging persists, make sure the air
conditioning (
page 230) is activated, or
press button0.
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229 Controls in detail
3-zone automatic climate control*
Activating
Press button: (
page 222).
The indicator lamp on the button
comes on.Deactivating

Press button: (
page 222).
The indicator lamp on the button
comes on.
At outside temperatures above 79°F
(26°C) the system will not automatically
switch back to outside air. A quantity of
outside air is added after approximately
30 minutes.Air recirculation mode with conve-
nience closing and opening feature
i
The air recirculation mode is activated auto-
matically at high outside temperatures.
The indicator lamp on button: is not lit when
the air recirculation mode is automatically
switched on.
A quantity of outside air is added after approxi-
mately 30 minutes.
If you have turned off the air conditioning
(
page 230) or the outside temperature is
below 41°F (5°C), the air recirculation mode will
not switch on automatically.
i
To cool the interior as fast as possible, the
automatic climate control automatically switch-
es to air recirculation. The indicator lamp on
button: is not lit when the system switches
to air recirculation automatically.
i
The air recirculation mode is deactivated
automatically


after 5 minutes if the outside temperature is
below approximately 41°F (5°C)


after 5 minutes if the air conditioning and
air-drying is turned off


after 30 minutes if the outside temperature
is above approximately 41°F (5°C)
Warning!
G
Never operate the side windows and
tilt/sliding sunroof* if there is the possibility
of anyone being harmed by the opening or
closing procedure.
In case the procedure causes potential
danger:
Vehicles with or without tilt/sliding sun-
roof*: The closing of the windows can be im-
mediately halted by pressing or pulling the
respective window switch. The closing of the
tilt/sliding sunroof* can be immediately
halted by moving the switch for the tilt/slid-
ing sunroof* in any direction.
The closing of the side windows and the
tilt/sliding sunroof* can be reversed by
again pressing and holding the :button.
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